Ammeter receptacle



G. G. ERB

METER RECEPI'ACLE File d Nov. 30, 1923 June 29 1926.

INVENTOR' Gf'O/PG'F 6. f? 8- ATTORNEY Patented June 29, 1926.

UNITED STATES GEORGE ERIB,'OF NEWYORK, N. Y.

AMMETER .RECEPTACLE.

Application filed November 30, 1923. Serial No. 677,912.

Among the principal objects which the present invention has in view are: to protect electrical instruments from effects of inclement weather when in service; to afford substantial and solid supports for said instruments; and to accommodate certain instruments having rearward extensions to be influenced by electric flow.

Drawings.

Figure l is a front view of an ammeter of usual construction mounted in a receptacle constructed and arranged in accordance with the present invention.

Figure 2 is a side edge view of the same.

Figure 3 is a rearward view of the same, a portion of the extended pocket whereof being cut away to show the relation between the variable member of the ammeter and a supply of wire for affecting the same.

Figure 1 is a cross section of the same, the section being taken on the line H in Fig. 3.

Figure 5 is a vertical section of a modified form of the receptacle. showing the ammeter as supported therein.

Figure 6 is a further modification of the receptacle, an ammeter being shown therewith.

Figure 7 is a further modification of the receptacle.

Description.

The ammeter 12 shown in the drawings is of a conventional construction wherein is employed a permanent magnet 13, the loop of which as can be seen in the drawings, is extended rearwardly from the case of the ammeter. In this form of ammeter the in dex needle 14 is held in a neutral position by the magnet 13 when the magnetic fields are not disturbed. The loop of the magnet 13 is extended beyond the casing of the ammeter to form a passage for an electric supply wire 15. The wire 15 is incorporated in the operating circuits with which the battery or other source of supply is connected. As the current passes through the. wire 15 the magnetic fields of the magnet 13 are afiected by the current passing through the loop of the magnet.

It will be noted that the insulation 16 of the Wire is not removed or otherwise disturbed by installing it within the loop of the magnet. I

above described has served all purposes for which it was intended, but

byreason of the fact that it is exposed to weather, and'particularly the loop of the magnet 13, it is more or less worn or corroded thereby. To avoid the exposure to weather I have provided a light metal receptacle 17, having bottom and side edge integrally constructed. The side edges are reinforced at points by the bosses 18, preferably three in number which extend inward for engagement with the side of the ammeter 12. These bosses are bored and tapped to receive screws 19 which hold the ammeter in the receptacle.

The receptacle 17 has at the rear thereof an extension 20 which forms a chamber adapted to receive the extended portion of the magnet 14:. The side Walls of the chamber 13, as best seen in Figures 2 and 3 are pressed to form openings 21, through which the wire 15 may be extended.

It will be noted that the openings 21 are in line with the loop 13 so that the wire 15 carrying its insulation may be freely extended therethrough.

For supporting the receptacle 17, a bracket 22 is provided. The bracket 22 as seen best in Figure 2 of the drawings has a perforation 23 to receive a mounting screw or bolt of any suitable character by which the instrument is installed on the frame of a motorcycle or other apparatus.

In Figure 5 of the drawings a modified form of the receptacle is shown, the modification consisting in extending the whole back of the receptacle to form a globe-like rear wall 2 1. The wall 24: has suificient rearward extension to permit the loop of the magnet 13 to rest freely therein. In line with the loop of the magnet 13, the wall 24 is perforated to form passageways for the wire 15 and its insulating coating 16. The bracket 25 is provided integral with the back 24c to function as the bracket 22 on the preferred type. i

In Figure 6 a further modification of the construction of the receptacle is shown, the modification consisting in providing a rearwardly projecting and somewhat curtailed hood 26. The hood 26 extends above the loop of the magnet 13 and laterally therefrom to shed any moisture or other substance that might settle upon the said magnet from above. The hood 26 has no sides therefore requires no boring for the w'iri'e l5.

In Fi ure 7 ofthe drawings the modifica titan 511mm therein in emitting bath.

only the bracket 22 dissociated from the other feature which was designed to afford special protection to the magnet 18.

Ulam.

A receptacle for an electrically operated instrument comprising an open faced body portion, having a substantially fiat back and sides integral therewith, sald sides havin-g means adapted to retain an :mnneter in above 's'ai'd hood on said'flat back, and'the V opposed sides of the said hood being apercured in ahnenqent for the passage of an electric conductor entirely therethrough.

GEORGE G. EBB. 

